Help asap Arturo needs to write an explanatory text on how the human circulatory system works.

Which of the following paragraphs would be the best introduction for his topic?

A.
The human circulatory system causes blood to circulate throughout the body. It is an amazing system.
B.
Of all the systems in the human body, the circulatory system may be the most complex. To understand it completely requires many years of study.
C.
The heart is the main component of the human circulatory system. It beats from 60 to 100 times per minute, about 100,000 times per day, more than 30 million times per year, and about 2.5 billion times in a 70-year lifetime.
D.
The human circulatory system is responsible for sending blood throughout the body, which provides it with oxygen and nutrients. The heart, the arteries, and the veins are just three of the parts that make up this amazing system.

You are to write a five paragraph literary essay based on one of the 4 prompts and what you have read and learned in this module. these are your options: 1. how do the events of "the white umbrella" teach the narrator a lesson about shame and acceptance? 2. what role does creativity play in "the bat-poet"? 3. how does the character of squeaky change over the course of "raymond's run"? 4. discuss the influences of older family members on the protagonists and speakers in the stories and poems of this unit. you are to write a five paragraph literary essay based on what you have read and learned in this module. your final submission should meet the following requirements. • submit completed pre-writing and outline documents. • write an essay that contains an introduction with hook and thesis statement, supporting paragraphs with evidence and at least one quotation, and a conclusion that restates the thesis and reviews main points. • use transitions appropriate to the pattern of organization. • use vocabulary to create tone and voice. • cite primary source (quotation). • submit completed revision checklist. • vary sentence structure. • create sentences with parallel structures. • use technology in the writing process.